<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header :add="add"></Header>
      <List :todoList="todoList" :del="del" :updateDone="updateDone" />
      <Footer :todoList="todoList" :ischeck="ischeck" :removeDone="removeDone"></Footer>
    </div>
  </div>
</template>

<script>
import Header from "@/components/Header";
import Footer from "@/components/Footer";
import List from "@/components/List";
export default {
  name: "App",
  components: {
    Header,
    Footer,
    List,
  },
  data() {
    return {
      todoList: [
        // { id: "001", done: false, content: "酸菜鱼" },
        // { id: "002", done: false, content: "水煮肉片" },
        // { id: "003", done: false, content: "孜然土豆片" },
      ],
    };
  },

  // 数据进行储存
  mounted() {
    this.todoList = JSON.parse(localStorage.getItem("todoList") || "[]");
  },
  methods: {
    add(e) {
      const { value } = e.target;
      if (value === "") {
        alert("请输入内容");
        return;
      }
      if (this.todoList.find((item) => item.content === value)) {
        alert("内容重复，请重新输入");
        e.target.value = "";
        return;
      } else {
        this.todoList.unshift({
          id: Math.random().toString(36).substr(2),
          content: value,
          done: false,
        });
        e.target.value = "";
      }
    },
    del(id) {
      this.todoList = this.todoList.filter((item) => item.id !== id);
    },
    updateDone(id) {
      this.todoList.forEach((item) => {
        if (item.id === id) {
          item.done = !item.done;
        }
      });
    },
    // 全选
    ischeck(newVal) {
      this.todoList = this.todoList.map((item) => {
        item.done = newVal;
        return item;
      });
    },
    removeDone() {
      this.todoList = this.todoList.filter((item) => {
        return !item.done;
      });
    },
  },
  watch: {
    todoList: {
      deep: true,
      handler() {
        localStorage.setItem("todoList", JSON.stringify(this.todoList));
      },
    },
  },
};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>
